Cruise inventory

FV Avon Valley Young Fish Survey 1986

Cruise summary report

Cruise Info. 
Ship name (ship code)FV Avon Valley (74FV)
Cruise identifierYoung Fish Survey 1986
Cruise period1986-09-09 — 1986-09-26
StatusCompleted
Port of departureMudeford, United Kingdom
Port of returnMudeford, United Kingdom
PurposeResearch
ObjectivesComplete the survey in the area of Selsey Bill to Swanage Bay 9th - 13th. Push net sites samples throughout. Beam trawl survey of gravel extraction areas east of the Isle of Wight on 25th and 26th.

Young Fish Survey 1986 with: FV Alvic, FV Avon Valley, FV Challenge, FV Jo's Boys, FV Serenity, FV St Richard, FV Joanna J., FV Kimbill of Eden and FV Sharowna.

1. To carry out an inshore beam trawl and push net survey of part of the North Sea and English Channel coasts of young demersal fish in relation to the environment. To include collecting data for juvenile flatfish yearclass size estimation.
2. To continue studies of growth and mortality of young sole in the areas off Lowestoft and Rye Bay.
3. To carry out a beam trawl survey of gravel extraction grounds east of the Isle of Wight. (For AEP2)

Results:
1. In total in the Young Fish Survey. 313 hauls made using the standard 2m beam trawl and 52 push net sites using the standard 1.5m push net sampled. All fish caught identified and measured. Salinity and sediment samples collected and surface temperature, benthos, shrimp by-catch and dissolved oxygen (River Thames) observed at each station.

2. Lowestoft and Rye Bay. Detailed survey of the distribution and abundance of 0-group sole. Live 0-group sole were held in tanks for 24 hours then deep frozen for laboratory estimation of condition factors. Samples of 0-group sole collected for total lipid content analysis. Samples of 0-group sole and plaice collected for morphometric studies.

3. 26 beam trawl hauls were made in 5 gravel extraction areas east of the Isle of Wight. All fish caught were identified and measured and observations of benthos were recorded for each station.
Chief scientistColin L Whiting (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportFV Avon Valley Young Fish Survey 1986 cruise report commercial_vessels_aug86.pdf — access key 'C' (0.09 MB) 
Ocean/sea areas 
GeneralEnglish Channel
SpecificScottish Border-Swanage Bay Selsey Bill, Swanage Bay, Isle of Wight
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Description: observations made at every station
Biology and fisheries 
Biochemical measurements (eg lipids, amino acids)Description: samples of 0-group sole collected for total lipid content analysis
PhytobenthosDescription: observations made at every station
ZoobenthosDescription: observations made at every station
Demersal fishDescription: samples of 0 group sole and plaice for morphometric studies
Demersal fishDescription: distribution and abundance of 0-group sole
Demersal fishQuantity: number of hauls = 52
Description: (total throughout Young Fish Survey) push net sites
Demersal fishQuantity: number of hauls = 313
Description: (total throughout Young Fish Survey) beam trawl survey of Selsey Bill to Swanage Bay and east of the Isle of Wight
Demersal fishQuantity: number of hauls = 26
Description: 2m beam trawl survey in 5 gravel extraction areas east of the Isle of Wight
CrustaceansDescription: by-catch of shrimp recorded at each sitation
Other biological/fisheries measurementDescription: deep frozen sole
Geology and geophysics 
GrabDescription: observations made at every station